Dictionary > Basal lamina

Basal lamina

Definition
noun
(histology) A layer of extracellular matrix found on the basal surface of epithelial cells, and which is secreted by the epithelial cells.
(embryology) The ventral plate of the embryonic neural tube that gives rise to somatic and visceral motor neurons.
Supplement
In histology, basal lamina is composed of electron-dense layer called lamina densa (composed of type IV collagen) and electron-lucid layers called lamina lucida (made up of laminin, integrins, entactins, and dystroglycans) together make up the basal lamina.
The term “basal lamina” is usually used with electron microscopy, while the term “basement membrane” is usually used with light microscopy. That is because basal lamina is readily visible as distinct structure with the electron microscope, and not with a light microscope. In strict sense, basal lamina is different from basement membrane based on their components. The basal lamina is composed of lamina densa and lamina lucida whereas the basement membrane is composed of lamina densa and lamina reticularis; hence, the basement membrane includes only a portion of basal lamina, and including a layer not found in basal lamina.
Derived terms:

  • basal lamina of choroid
  • basal lamina of ciliary body
  • basal lamina of cochlear
  • basal lamina of neural tube
  • basal lamina of saemicircular duct
  • junctional basal lamina

Synonym: ventral plate of neural tube (embryology).

Compare: basement membrane.


You will also like...

Carbohydrates, fats and proteins - dietary sources
A Balanced Diet – Carbohydrates and Fat

Apart from vitamins, the human body also requires high energy sources such as carbohydrates and fats. If you want an ove..

Genetics and Evolution
Genetics and Evolution

Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

Ploidy
Polyploidy

Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

Developmental Biology
Developmental Biology

Developmental biology is a biological science that is primarily concerned with how a living thing grows and attains matu..

New Zealand Flora & Fauna
Ecology & Biodiversity: New Zealand Flora & Fauna

New Zealand is known for its unique biodiversity, caused by its remarkable geography and geologic history. Breaking away..

Human Neurology
Human Neurology

Human Neurology deals essentially with the nervous system of humans. It also features the various theories put forward b..

Related Articles...

No related articles found

See all Related Topics